What kind of songs can be considered as good songs?

the biggest concept of good music is that most people agree that good music is a form of artistic expression and an important aesthetic standard. For a good music, people who really understand music must give an evaluation, which is like watching film reviews. We will watch some filmmakers score the film and feel more convincing, while ordinary people may not have enough appreciation ability for some works of art. This also causes people to listen to the comments given by many people who know music. Then these people give a high evaluation to a music and say that it is good music. Then this kind of music is good music in the eyes of most people.